<?php

/*
 * Copyright (c) 2016 PIXEL FEDERATION, s.r.o.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the PIXEL FEDERATION, s.r.o. nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL PIXEL FEDERATION, s.r.o. BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

namespace Druid\QueryBuilder;

use Druid\Query\Component\ComponentInterface;
use Druid\Query\Component\Factory\AggregatorFactory;
use Druid\Query\Component\Factory\FilterFactory;
use Druid\Query\Component\Factory\HavingFactory;
use Druid\Query\Component\Factory\PostAggregatorFactory;
use Druid\Query\QueryInterface;

/**
 * Class AbstractQueryBuilder.
 */
abstract class AbstractQueryBuilder
{
    /**
     * @var array
     */
    protected $components = [];

    /**
     * @return AggregatorFactory
     */
    public function aggregator()
    {
        return new AggregatorFactory();
    }

    /**
     * @return PostAggregatorFactory
     */
    public function postAggregator()
    {
        return new PostAggregatorFactory();
    }

    /**
     * @return FilterFactory
     */
    public function filter()
    {
        return new FilterFactory();
    }

    /**
     * @return HavingFactory
     */
    public function having()
    {
        return new HavingFactory();
    }

    /**
     * @param string             $componentName
     * @param ComponentInterface $component
     *
     * @return $this
     */
    public function addComponent($componentName, ComponentInterface $component)
    {
        $componentExists = array_key_exists($componentName, $this->components);
        if (!$componentExists) {
            throw new \InvalidArgumentException(
                sprintf('Undefined component name %s', $componentName)
            );
        }

        $isMultipleComponent = is_array($this->components[$componentName]);
        if ($isMultipleComponent) {
            $this->components[$componentName] = \array_merge($this->components[$componentName], [$component]);

            return $this;
        }

        $this->components[$componentName] = $component;

        return $this;
    }

    /**
     * @return QueryInterface
     */
    abstract public function getQuery();
}
